﻿/*
* Copyright (c) 2010-2012 Tesla Engine Group
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

using System.Collections.Generic;

namespace Tesla.Graphics {
    /// <summary>
    /// Collection for display modes.
    /// </summary>
    public class DisplayModeCollection : IEnumerable<DisplayMode> {
        private IEnumerable<DisplayMode> _modes;

        /// <summary>
        /// Gets all the display modes in the collection with the specified surface
        /// format.
        /// </summary>
        /// <param name="format">Surface format to query display modes with</param>
        /// <returns>Display modes with the surface format</returns>
        public IEnumerable<DisplayMode> this[SurfaceFormat format] {
            get {
                List<DisplayMode> modes = new List<DisplayMode>();
                foreach(DisplayMode mode in _modes) {
                    if(mode.SurfaceFormat == format) {
                        modes.Add(mode);
                    }
                }
                return modes;
            }
        }

        /// <summary>
        /// Creates a new display mode collection.
        /// </summary>
        /// <param name="modes">Display modes</param>
        public DisplayModeCollection(IEnumerable<DisplayMode> modes) {
            _modes = modes;
        }

        /// <summary>
        /// Get the collection's enumerator.
        /// </summary>
        /// <returns>Enumerator</returns>
        public IEnumerator<DisplayMode> GetEnumerator() {
            return (IEnumerator<DisplayMode>) _modes.GetEnumerator();
        }


        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() {
            return _modes.GetEnumerator();
        }

    }
}
